Did you mean: Mstislav Mstislavich
Mstislav Rostislavich, known as "The Brave", was Prince of Smolensk and Prince of Novgorod.
Mstislav was the fourth of five sons of Rostislav Mstislavich, who was briefly Grand Prince of Kiev in 1167. Wikipedia
Died: June 13, 1180, Veliky Novgorod, Russia
Great-grandparents: Vladimir II Monomakh, Gytha of Wessex, and Inge the Elder
Great grandchildren: Alexander Nevsky, Yaroslav of Tver, Andrey II of Vladimir, and more
Parents: Rostislav I of Kiev
Grandparents: Mstislav I of Kiev and Christina Ingesdotter of Sweden
Grandchildren: Theodosia, Anna of Novgorod, Vasily Mstislavich, and more
Children: Mstislav Mstislavich and David Mstislavich